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Free research papers and essays on topics related to: apoptosis

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  • Apoptosis And Aging - 1,110 words
    Apoptosis And Aging When we gain control of the gene responsible for the phenomenon of apoptosis, we will be in control of aging. We are finding more evidence every day, indicating genetic links to all sorts of factors in the human being. We are just now beginning to scratch the surface of our own genetics. A landmark discover has just been unveiled: In February [2001], the two groups charting the human genome published their results - the entire 3 billion base pair sequence. The only definitive conclusion so far: Humans are far more complicated than we thought. ... Eric Lander, director of the Whitehead Center for Genome Research in Cambridge, Massachusetts ... adds: "within a decade, we wi ...
    Related: aging, apoptosis, personal interview, natural process, florida
  • Aids And Retroviruses - 1,286 words
    ... AP) to a cellular receptor. Receptor molecules can be proteins (glycoproteins), or the sugar residues present on glycoproteins or glycolipids. Some complex viruses, for example, Poxviruses and Herpesviruses may have more than one receptor-binding protein, therefore, there may be alternative routes of uptake into cells. The expression or absence of receptors on the surface of cells largely determines the tropism of most viruses, that is, the type of cell in which they are able to replicate.  Penetration Unlike attachment, viral penetration is an energy-dependent process; that is, the cell must be metabolically active for this to occur. Three mechanisms may be involved:  Tr ...
    Related: aids, genetic code, life cycle, immune system, replication
  • Alzheimers Disease - 1,539 words
    Alzheimer`s Disease Alzheimers Disease is a progressive, degenerative disease that affects the brain. Individuals with AD experience a progressive and specific loss of cognitive function resulting from the differentiation of the limbic system, association neocortex, and basal forebrain. It is also accompanied by the deposition of amyloid in plaques and cerebrovasculature, and the formation of neurofibrillary tangles in neurons. Alois Alzheimer, a German doctor, diagnosed this disease for the first time in 1907. At that time it was considered a rare disorder. Currently, this tragic brain disorder affects approximately four million people; It is the most common type of dementia and the fourth ...
    Related: alois alzheimer, alzheimer's disease, alzheimers disease, physiological processes, limbic system
  • Cancer - 668 words
    Cancer Good morning ladies and gentlemen, my colleagues and I have called you in at such short notice because we need to discuss a patient who was brought to our attention earlier this week. The patient presented with rapidly progressing lymphadenopathy, subsequent examination lymph nodes congested with many small B-lymphocytes. The B-lymphocytes showed a significant chromosomal aberration in the form a 14;18 translocation. The patient has been diagnosed with lymphoma and has been prescribed an immediate course of chemotherapy. This mornings presentation will include a short description of the cell cycle and how and where certain checkpoints of genomic integrity function. My colleagues Assoc ...
    Related: cancer, good morning, protein synthesis, cell division, mutation
  • Cancer - 1,605 words
    Cancer Final Draft T. J. Cox The problem is cancer. Cancer is the second leading cause of death in the world and my interest in the subject is simple. My mother is the most resilient person I have ever met. Any time I need any kind of inspiration, I need only to think of her. When she was eighteen she was diagnosed with Hodgkins disease. The doctors gave her a less than thirty percent chance of living. Since then she has had cancer three other times. Breast cancer twice in 85 and 90, and most recently, colon cancer two summers ago. She has had many different treatments including chemo and radiation therapy as well as surgery to remove lumps in both breasts and her colon. What is cancer? Ther ...
    Related: breast cancer, cancer, cancer therapy, colon cancer, radiation therapy
  • The - 1,982 words
    The Immunology of Aids Introduction Although HIV was first identified in 1983, studies of previously stored blood samples indicate that the virus entered the U.S. population sometime in the late 1970s. Worldwide, an estimated 27.9 million people had become HIV-infected through mid-1996, and 7.7 million had developed AIDS, according to the World Health Organization (WHO). AIDS is a disease of the immune system, and is caused by Human Immuno deficiency Virus (HIV). HIV targets and infects T-helper cells and macrophages. After infection, replication of the virus occurs within the T-helper cells. The cells are lysed and the new viruses are released to infect more T-helper cells. The course of th ...
    Related: world health organization who, health organization, world health, diversity
  • The - 1,929 words
    ... hich are usually non-syncytium-inducing, require the CCR-5 receptor, which is found on both monocytes and T lymphocytes. This illustrates why these isolates can infect monocytes and primary lymphocytes, both of which express CCR-5, but not T-cell lines, which lack this co-receptor. By contrast, T-cell-tropic strains cannot infect monocytes because they lack the CXCR-4 co-receptor. CD8+ T cells are thought to also secrete other soluble factors-as yet unidentified-that suppress HIV replication. The Loss of Cells of the Immune System Researchers around the world are studying how HIV destroys or disables CD4+ T cells, and it is thought that a number of mechanisms may occur simultaneously in ...
    Related: side effects, fatigue syndrome, lymph node, vulnerable
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